The number of -CH2- (methylene) groups in the product formed from the following reaction sequence is ____.
Answer: 0
Solution
The reaction sequence involves ring-opening and rearrangement. Analyzing the mechanism and final product structure, the product contains no methylene (-CH₂-) groups; all carbons are either part of functional groups or bear substituents.
JEE Advanced · 2022 · 28 Aug 2022 · Paper 2 · Integer answer